ACF functionality and readme update

wordpress/wp-content/themes/saburly-headless/inc/acf-options.php

@@ -0,0 +1,13 @@
+<?php
+
+// Add a custom options page to associate ACF fields with
+if ( function_exists( 'acf_add_options_page' ) ) {
+    acf_add_options_page( [
+        'page_title' => 'Headless Settings',
+        'menu_title' => 'Headless',
+        'menu_slug'  => 'headless-settings',
+        'capability' => 'manage_options',
+        'post_id'    => 'headless-settings',
+        'redirect'   => false,
+    ] );
+}